ALEXANDRIA, Va., June 5 -- United States Patent no. 12,274,764, issued on April 15, was assigned to HASS Co. LTD. (Gangneung-si, South Korea).
"Dental bulk block and method of manufacturing same" was invented by Hyung Bong Lim (Ansan-si, South Korea) and Yong Su Kim (Gangneung-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a dental bulk block comprising a crystalline phase includes lithium disilicate as a main crystalline phase and eucryptite as a sub-crystalline phase in an amorphous glass matrix that is a functionally graded material having a main crystalline size gradient with respect to the depth thereof, and having no interface at the point of change in the main crystalline s...